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Method and system for multilayer single-channel continuous arc additive manufacturing of metal structural parts

A metal structure, multi-layer and single-pass technology, applied in the field of additive manufacturing, can solve the problems of discontinuous additive process, uneven chemical composition, insufficient strength, etc., to shorten the development cycle, reduce the number of processing technology steps, and achieve mechanical properties. Good results

Active Publication Date: 2021-05-28
NANJING ENIGMA IND AUTOMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing multi-layer single arc additive manufacturing technology has a discontinuous additive process, each layer has arc start and arc extinguishing positions, and the increase of arc start and arc extinguishing positions will further cause uneven chemical composition, insufficient strength, and unreliable Fusion and other issues

Method used

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  • Method and system for multilayer single-channel continuous arc additive manufacturing of metal structural parts
  • Method and system for multilayer single-channel continuous arc additive manufacturing of metal structural parts
  • Method and system for multilayer single-channel continuous arc additive manufacturing of metal structural parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Example 1: 4mm thick 4043 aluminum alloy ring-shaped regular structural part multi-layer single-channel arc additive manufacturing

[0120] Such as figure 2 As shown, the aluminum alloy structure has a height of 200 mm and a wall thickness of 6 mm. It is formed by 181 layers of continuous spiral welding arc additive manufacturing, and the height of each layer of welding seam is 1.1 mm. It is manufactured by a multi-layer single-pass electric arc additive method for metal structural parts described in the present invention. Specifically:

[0121] Print the selected 6061 aluminum alloy sheet with a substrate thickness of 15mm. The welding wire used is 4043 aluminum alloy welding wire with a diameter of 1.2mm. First, calculate the heat input through the optimal temperature required for workpiece forming, so as to obtain a set of suitable forming process parameters: select The welding process is CMT+P and CMT Advance, the welding current is 59A, the wire feeding speed is...

Embodiment 2

[0125] Example 2: 8mm thick 4043 aluminum alloy twisted polygon ring structure multi-layer single-channel arc additive manufacturing

[0126] The difference from Example 1 is:

[0127] Such as image 3 As shown, the aluminum alloy structure has a height of 500 mm and a wall thickness of 8 mm. It is formed by 556 layers of continuous spiral welding arc additive manufacturing, and the height of each layer of welding seam is 0.9 mm. It is manufactured by a multi-layer single-channel continuous arc additive method for metal structural parts described in the present invention. Specifically:

[0128] Print the selected 6061 aluminum alloy sheet with a substrate thickness of 16mm. The welding wire used is 4043 aluminum alloy welding wire with a diameter of 1.2mm. First, calculate the heat input through the optimal temperature required for workpiece forming, so as to obtain a suitable set of forming process parameters: select welding The process is CMT+P, the welding current is 90A...

Embodiment 3

[0132] Example 3: Multi-layer single-pass arc additive manufacturing of 6mm thick stainless steel regular structure

[0133] Such as Figure 4 As shown, the height of the stainless steel structural part is 420 mm, the wall thickness is 6 mm, and it is formed by 323 layers of continuous spiral welding arc additive manufacturing, and the height of each layer of welding seam is 1.3 mm. It is manufactured by a multi-layer single-channel continuous arc additive method for metal structural parts described in the present invention. Specifically:

[0134] Print the selected Q235 carbon steel substrate with a thickness of 16mm. The welding wire used is 308L stainless steel welding wire with a diameter of 0.8mm. First, calculate the heat input through the optimal temperature required for workpiece forming, so as to obtain a set of suitable forming process parameters: Selective welding The process is CMT, the welding current is 90A, the wire feeding speed is 8.5m / min, the welding speed...

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Abstract

The present invention proposes a multi-layer single-channel continuous arc additive manufacturing method and system for metal structural parts. The method adopts a welding machine as a heat source, a metal wire as a forming material, and the welding device is driven by a robot according to a planned continuous spiral. Slicing path motion for arc additive manufacturing on a substrate. First, select the welding wire and substrate needed to form a specific metal structure; then generate a continuous spiral slice path; finally, the welding gun moves according to the generated continuous spiral path under the drive of the robot, and the servo system drives the welding gun mechanical arm according to the calculated spiral path, The welding torch is driven by the welding torch manipulator to print a single-pass weld seam along a predetermined trajectory, and the height of the welding torch from the substrate is gradually increased during the printing process according to the helical path. The continuous spiral path makes the height of the welding torch from the substrate gradually increase during the entire 3D printing process, but keeps the dry elongation constant, and the arc will not be extinguished during the entire printing process, and finally a metal structure with excellent performance is formed.

Description

technical field [0001] The invention relates to a multilayer single-channel continuous arc additive manufacturing method and system for metal structural parts, belonging to the field of additive manufacturing. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing, AM) is also known as "entity free manufacturing", "3D printing technology", etc. Compared with traditional subtractive manufacturing (cutting) technology, it is a "bottom-up" The manufacturing method of material accumulation is based on mathematical modeling and based on the principle of discrete accumulation, which is an emerging manufacturing technology that accumulates materials layer by layer to produce solid parts. After nearly a century of development, additive manufacturing technology has realized the rapid manufacturing of organic materials, inorganic non-metallic materials, and metal material products. For metal materials, the additive manufacturing technology is classifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04
CPCB23K9/04
Inventor 董巍程远唐凯李鹏一胡冬双徐龙吴晓
Owner NANJING ENIGMA IND AUTOMATION TECH CO LTD
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